; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown-unknown | FileCheck %s --check-prefixes=X86
; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefixes=X64
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+bmi | FileCheck %s --check-prefixes=X64
; PR52267
; InstCombine transforms an 'add' with min-signed-value into an 'xor'.
; LEA instruction selection should be able to see through that
; transform and reduce add/shift/xor instruction counts and moves.
;
; XOR(X,MIN_SIGNED_VALUE)
;
define i8 @xor_sminval_i8(i8 %x) {
; X86-LABEL: xor_sminval_i8:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT: addb $-128, %al
; X86-NEXT: retl
;
; X64-LABEL: xor_sminval_i8:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -128(%rdi), %eax
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%r = xor i8 %x, 128
ret i8 %r
}
; negative test
define i8 @xor_notsminval_i8(i8 %x) {
; X86-LABEL: xor_notsminval_i8:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT: xorb $127, %al
; X86-NEXT: retl
;
; X64-LABEL: xor_notsminval_i8:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: xorb $127, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%r = xor i8 %x, 127
ret i8 %r
}
define i16 @xor_sminval_i16(i16 %x) {
; X86-LABEL: xor_sminval_i16:
; X86: # %bb.0:
; X86-NEXT: movl $32768, %eax # imm = 0x8000
; X86-NEXT: xorl {{[0-9]+}}(%esp), %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: retl
;
; X64-LABEL: xor_sminval_i16:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: xorl $32768, %eax # imm = 0x8000
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%r = xor i16 %x, 32768
ret i16 %r
}
define i32 @xor_sminval_i32(i32 %x) {
; X86-LABEL: xor_sminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl $-2147483648, %eax # imm = 0x80000000
; X86-NEXT: xorl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: xor_sminval_i32:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -2147483648(%rdi), %eax
; X64-NEXT: retq
%r = xor i32 %x, 2147483648
ret i32 %r
}
; negative test
define i32 @xor_notsminval_i32(i32 %x) {
; X86-LABEL: xor_notsminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl $32768, %eax # imm = 0x8000
; X86-NEXT: xorl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: xor_notsminval_i32:
; X64: # %bb.0:
; X64-NEXT: movl %edi, %eax
; X64-NEXT: xorl $32768, %eax # imm = 0x8000
; X64-NEXT: retq
%r = xor i32 %x, 32768
ret i32 %r
}
define i64 @xor_sminval_i64(i64 %x) {
; X86-LABEL: xor_sminval_i64:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl $-2147483648, %edx # imm = 0x80000000
; X86-NEXT: xorl {{[0-9]+}}(%esp), %edx
; X86-NEXT: retl
;
; X64-LABEL: xor_sminval_i64:
; X64: # %bb.0:
; X64-NEXT: movabsq $-9223372036854775808, %rax # imm = 0x8000000000000000
; X64-NEXT: xorq %rdi, %rax
; X64-NEXT: retq
%r = xor i64 %x, -9223372036854775808
ret i64 %r
}
;
; XOR(ADD/SUB(X,C),MIN_SIGNED_VALUE)
;
define i8 @xor_add_sminval_i8(i8 %x, i8 %y) {
; X86-LABEL: xor_add_sminval_i8:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT: addb {{[0-9]+}}(%esp), %al
; X86-NEXT: addb $-128, %al
; X86-NEXT: retl
;
; X64-LABEL: xor_add_sminval_i8:
; X64: # %bb.0:
; X64-NEXT: # kill: def $esi killed $esi def $rsi
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal (%rdi,%rsi), %eax
; X64-NEXT: addb $-128, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%s = add i8 %x, %y
%r = xor i8 %s, 128
ret i8 %r
}
define i16 @xor_sub_sminval_i16(i16 %x) {
; X86-LABEL: xor_sub_sminval_i16:
; X86: # %bb.0:
; X86-NEXT: movl $32766, %eax # imm = 0x7FFE
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: retl
;
; X64-LABEL: xor_sub_sminval_i16:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal 32766(%rdi), %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%s = sub i16 %x, 2
%r = xor i16 %s, 32768
ret i16 %r
}
define i32 @xor_add_sminval_i32(i32 %x) {
; X86-LABEL: xor_add_sminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl $-2147483136, %eax # imm = 0x80000200
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: xor_add_sminval_i32:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -2147483136(%rdi), %eax
; X64-NEXT: retq
%s = add i32 %x, 512
%r = xor i32 %s, 2147483648
ret i32 %r
}
define i64 @xor_add_sminval_i64(i64 %x, i64 %y) {
; X86-LABEL: xor_add_sminval_i64:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: adcl {{[0-9]+}}(%esp), %edx
; X86-NEXT: addl $-2147483648, %edx # imm = 0x80000000
; X86-NEXT: retl
;
; X64-LABEL: xor_add_sminval_i64:
; X64: # %bb.0:
; X64-NEXT: leaq (%rdi,%rsi), %rcx
; X64-NEXT: movabsq $-9223372036854775808, %rax # imm = 0x8000000000000000
; X64-NEXT: xorq %rcx, %rax
; X64-NEXT: retq
%s = add i64 %x, %y
%r = xor i64 %s, -9223372036854775808
ret i64 %r
}
;
; ADD/SUB(XOR(X,MIN_SIGNED_VALUE),C)
;
define i8 @sub_xor_sminval_i8(i8 %x, i8 %y) {
; X86-LABEL: sub_xor_sminval_i8:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT: addb $-128, %al
; X86-NEXT: subb {{[0-9]+}}(%esp), %al
; X86-NEXT: retl
;
; X64-LABEL: sub_xor_sminval_i8:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -128(%rdi), %eax
; X64-NEXT: subb %sil, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%r = xor i8 %x, 128
%s = sub i8 %r, %y
ret i8 %s
}
define i16 @add_xor_sminval_i16(i16 %x) {
; X86-LABEL: add_xor_sminval_i16:
; X86: # %bb.0:
; X86-NEXT: movl $-32766, %eax # imm = 0x8002
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: retl
;
; X64-LABEL: add_xor_sminval_i16:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -32766(%rdi), %eax
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%r = xor i16 %x, 32768
%s = add i16 %r, 2
ret i16 %s
}
define i32 @sub_xor_sminval_i32(i32 %x) {
; X86-LABEL: sub_xor_sminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl $2147483136, %eax # imm = 0x7FFFFE00
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: retl
;
; X64-LABEL: sub_xor_sminval_i32:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal 2147483136(%rdi), %eax
; X64-NEXT: retq
%r = xor i32 %x, 2147483648
%s = sub i32 %r, 512
ret i32 %s
}
define i64 @add_xor_sminval_i64(i64 %x, i64 %y) {
; X86-LABEL: add_xor_sminval_i64:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: addl {{[0-9]+}}(%esp), %eax
; X86-NEXT: adcl {{[0-9]+}}(%esp), %edx
; X86-NEXT: addl $-2147483648, %edx # imm = 0x80000000
; X86-NEXT: retl
;
; X64-LABEL: add_xor_sminval_i64:
; X64: # %bb.0:
; X64-NEXT: movabsq $-9223372036854775808, %rax # imm = 0x8000000000000000
; X64-NEXT: addq %rdi, %rax
; X64-NEXT: addq %rsi, %rax
; X64-NEXT: retq
%r = xor i64 %x, -9223372036854775808
%s = add i64 %y, %r
ret i64 %s
}
;
; XOR(SHL(X,C),MIN_SIGNED_VALUE)
;
define i8 @xor_shl_sminval_i8(i8 %x) {
; X86-LABEL: xor_shl_sminval_i8:
; X86: # %bb.0:
; X86-NEXT: movzbl {{[0-9]+}}(%esp), %eax
; X86-NEXT: addb %al, %al
; X86-NEXT: addb $-128, %al
; X86-NEXT: retl
;
; X64-LABEL: xor_shl_sminval_i8:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal (%rdi,%rdi), %eax
; X64-NEXT: addb $-128, %al
; X64-NEXT: # kill: def $al killed $al killed $eax
; X64-NEXT: retq
%s = shl i8 %x, 1
%r = xor i8 %s, 128
ret i8 %r
}
define i16 @xor_shl_sminval_i16(i16 %x) {
; X86-LABEL: xor_shl_sminval_i16:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: shll $2, %eax
; X86-NEXT: xorl $32768, %eax # imm = 0x8000
; X86-NEXT: # kill: def $ax killed $ax killed $eax
; X86-NEXT: retl
;
; X64-LABEL: xor_shl_sminval_i16:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal (,%rdi,4), %eax
; X64-NEXT: xorl $32768, %eax # imm = 0x8000
; X64-NEXT: # kill: def $ax killed $ax killed $eax
; X64-NEXT: retq
%s = shl i16 %x, 2
%r = xor i16 %s, 32768
ret i16 %r
}
define i32 @xor_shl_sminval_i32(i32 %x) {
; X86-LABEL: xor_shl_sminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: leal -2147483648(,%eax,8), %eax
; X86-NEXT: retl
;
; X64-LABEL: xor_shl_sminval_i32:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: leal -2147483648(,%rdi,8), %eax
; X64-NEXT: retq
%s = shl i32 %x, 3
%r = xor i32 %s, 2147483648
ret i32 %r
}
; negative test
define i32 @xor_bigshl_sminval_i32(i32 %x) {
; X86-LABEL: xor_bigshl_sminval_i32:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: shll $8, %eax
; X86-NEXT: addl $-2147483648, %eax # imm = 0x80000000
; X86-NEXT: retl
;
; X64-LABEL: xor_bigshl_sminval_i32:
; X64: # %bb.0:
; X64-NEXT: # kill: def $edi killed $edi def $rdi
; X64-NEXT: shll $8, %edi
; X64-NEXT: leal -2147483648(%rdi), %eax
; X64-NEXT: retq
%s = shl i32 %x, 8
%r = xor i32 %s, 2147483648
ret i32 %r
}
define i64 @xor_shl_sminval_i64(i64 %x) {
; X86-LABEL: xor_shl_sminval_i64:
; X86: # %bb.0:
; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
; X86-NEXT: movl {{[0-9]+}}(%esp), %edx
; X86-NEXT: shldl $2, %eax, %edx
; X86-NEXT: shll $2, %eax
; X86-NEXT: addl $-2147483648, %edx # imm = 0x80000000
; X86-NEXT: retl
;
; X64-LABEL: xor_shl_sminval_i64:
; X64: # %bb.0:
; X64-NEXT: movabsq $-9223372036854775808, %rax # imm = 0x8000000000000000
; X64-NEXT: leaq (%rax,%rdi,4), %rax
; X64-NEXT: retq
%s = shl i64 %x, 2
%r = xor i64 %s, -9223372036854775808
ret i64 %r
}
Codebase Browser
llvm